At 28.7 KB, this PDF for the 2SC4634LS is likely a condensed datasheet for a package variant of the 2SC4634 NPN transistor. The name does not explain what the LS suffix means. Although indexed as a schematic, it does not describe a device circuit. Use it to verify lead configuration, body dimensions and the key voltage and current limits. Confirm the marking on the failed component matches before ordering a replacement or adapting a different package to the footprint.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.